1. Fabrication and characterization of bio-nanocomposite films using κ-Carrageenan and Kappaphycus alvarezii seaweed for multiple industrial applications.
- Author
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Sudhakar, Muthiyal Prabakaran, Venkatnarayanan, Srinivas, and Dharani, Gopal
- Subjects
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CARRAGEENANS , *METAL nanoparticles , *MARINE algae , *INDUSTRIAL applications , *SILICA , *METALLIC oxides , *MARINE plants - Abstract
In the present study, the whole seaweed from Kappaphycus alvarezii (containing carrageenan) was used for preparation of bio-nanocomposite films by blending with metal oxide nanoparticles such as zinc oxide (ZnONPs), cupric oxide (CuONPs) and silicon dioxide (SiO 2 NPs) for multiple applications, and their properties were compared with standard refined κ -Carrageenan (commercial grade). Simultaneously, the antibacterial activity and biodegradation profile of the prepared bio-nanocomposite film were also studied. The incorporation of nanoparticles into the bioplastic film matrices altered the surface morphology, increased the roughness and significantly (p < 0.05) reduced the UV transmittance, water uptake ratio (WUR), moisture content and solubility in both standard carrageenan-based bio-nanocomposite films (CBF) and Kappaphycus - based bio-nanocomposite films (KBF) compared to control. The average roughness (Ra) of KBF increased compared to CBF; however, CBF showed better tensile strength compared to KBF. Both KBF and CBF loaded with nanoparticles exhibited strong antibacterial activity against Staphylococcus aureus and Escherichia coli. However, KBF performed better compared to CBF. Antimicrobial effect of nanoparticles delayed the degradation of the bio-nanocomposite films. The present study proposes that the whole seaweed (Kappaphycus alvarezii) can be used directly for multiple industrial applications. [Display omitted] • Carrageenan blended along with PEG 3000, improved the mechanical strength of the bio-nanocomposite film. • Nanoparticles incorporation in the film exhibited better mechanical, optical and water barrier properties. • Bio-nanocomposite films showed better activity against pathogenic bacteria. • Degradation potential of bio-nanocomposite films ranged from 10 to 15 days. • Kappaphycus sp. serves as a better alternative to biopolymer and can be employed for different applications. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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